This document provides an overview of a lecture on airborne pulse Doppler radar systems. It discusses different airborne radar missions including fighter/interceptor radars like those used on F-16s and F-35s, as well as airborne early warning radars like AWACS. It covers topics like airborne radar clutter, pulse Doppler modes using different PRFs, and examples of military radars and their specifications. The goal is to explain the considerations and techniques involved in airborne pulse Doppler radar system design and operation.
Review of Radar Science, Technology, Applications, News, Publications, Industry, History, etc.
Tuesday, February 28, 2017
Sunday, February 26, 2017
Lecture 13 from the Radar System Engineering course by Dr. Robert O'Donnell.
This document discusses Doppler filtering techniques for radar clutter rejection. It begins with an introduction to the problem of rejecting ground, sea, rain, and bird clutter for radar systems. It then covers pulse Doppler processing techniques including the use of burst waveforms and Doppler filter banks. It concludes with a discussion of implementations of Doppler filters and issues with airborne pulse Doppler radars.
Friday, February 24, 2017
Lecture 12 from the Radar System Engineering course by Dr. Robert O'Donnell.
This document contains lecture slides about radar clutter rejection techniques. It discusses the history of moving target indication (MTI) and how digital technology has enabled more advanced processing. MTI uses Doppler filtering to suppress stationary clutter and detect moving targets. Early MTI employed crude subtraction of stored pulses. Modern digital implementations allow complex signal processing over many pulses for improved clutter cancellation.
Wednesday, February 22, 2017
Lecture 11 from the Radar System Engineering course by Dr. Robert O'Donnell.
The document describes a lecture on radar waveforms and pulse compression. It introduces matched filters and how they are implemented by convolving a reflected echo with a time-reversed transmit pulse. This maximizes the signal-to-noise ratio. Pulse compression techniques like linear frequency modulation and phase coding are then discussed, which allow the use of longer pulses that increase energy while maintaining high range resolution. The goal is to reduce the high peak power needs of short pulses for applications like airborne radar.
Sunday, February 19, 2017
Lecture 10 from the Radar System Engineering course by Dr. Robert O'Donnell.
The first part of this lecture discusses radar clutter from unwanted objects like ground, sea, rain, and birds/insects. It provides examples of military radars for which clutter is an issue and outlines factors that affect ground clutter backscatter like terrain type, frequency, and depression angle. Median ground clutter strength values are shown for various terrain types and frequencies.
The second part of the lecture provides details on the attributes of rain clutter such as how it is affected by wavelength and circular polarization. Graphs are presented showing reflectivity of rain and its Doppler spectrum. Bird clutter properties around radar cross-section, velocity, and density are also covered. The document aims to explain the impact of various clutter sources on radar performance.
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